diff -uNr ugs.ORIG/Imakefile.def ugs/Imakefile.def
--- ugs.ORIG/Imakefile.def	Mon Mar  9 16:47:19 1998
+++ ugs/Imakefile.def	Mon Jul 14 20:40:57 2003
@@ -3,10 +3,11 @@
  */
 
 /* #define LinuxAoutArchitecture */
-#define LinuxElfArchitecture
+/* #define LinuxElfArchitecture */
 /* #define SunArchitecture */
 /* #define DigitalArchitecture */
 /* #define FreeBSDArchitecture */
+#define DarwinArchitecture
 
 /*-------------- Do not change the followings ---------------*/
 
@@ -55,6 +56,17 @@
 FC      = g77 
 FFLAGS  = -O2 -fno-automatic -finit-local-zero -fno-backslash
 CFLAGS  = -O2 -I/usr/X11R6/include
+AR      = ar
+ARFLAGS = rv
+RANCMD  = $(RANLIB) $(LIB)
+BITLIB  = src/bit
+#endif
+
+#if defined(DarwinArchitecture)
+ARCH    = __APPLE__
+FC      = g77 
+FFLAGS  = -O0 -fno-automatic -finit-local-zero -fno-backslash -Wno-globals
+CFLAGS  = -O0 -I/usr/X11R6/include
 AR      = ar
 ARFLAGS = rv
 RANCMD  = $(RANLIB) $(LIB)
diff -uNr ugs.ORIG/src.2.10d/aux.c ugs/src.2.10d/aux.c
--- ugs.ORIG/src.2.10d/aux.c	Sun May 19 17:27:04 1996
+++ ugs/src.2.10d/aux.c	Mon Jul 14 19:52:49 2003
@@ -1,6 +1,6 @@
 #include <stdlib.h>
 
-#if ( defined(__LINUX_AOUT) || defined(__LINUX_ELF) )
+#if ( defined(__LINUX_AOUT) || defined(__LINUX_ELF) || defined(__APPLE__) )
 void free_   ( idum )   void *idum ;  { free (idum) ; }
 void malloc_ ( idum ) size_t *idum ;  { malloc (*idum) ; }
 #endif